Improved energy storage performance of nanocomposites with Bi4.2K0.8Fe2O9+δ nanobelts

Chuangming Hou; Zhiwei Bao; Haoyang Sun; Yuewei Yin; Xiaoguang Li

Journal of Materiomics (Jun 2020)

Improved energy storage performance of nanocomposites with Bi4.2K0.8Fe2O9+δ nanobelts

Chuangming Hou,
Zhiwei Bao,
Haoyang Sun,
Yuewei Yin,
Xiaoguang Li

Affiliations

Chuangming Hou: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China
Zhiwei Bao: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China
Haoyang Sun: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China
Yuewei Yin: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China; Corresponding author.
Xiaoguang Li: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China; School of Physics and Materials Science, Anhui University, Hefei, 230601, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing, 210093, China; Corresponding author. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China.

Journal volume & issue: Vol. 6, no. 2
pp. 371 – 376

Abstract

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Modern electronics and electric power grids require high performance polymer-based dielectric nanocomposites. To realize large-scale applications, the energy density of nanocomposites needs to be further increased. Here, we demonstrate a remarkable improvement in energy density of poly(vinylidene fluoride) (PVDF) matrix upon the incorporation of high-κ Bi4.2K0.8Fe2O9+δ (BKFO) nanobelts. High aspect ratio BKFO nanobelts can enhance the Young's moduli of the nanocomposites and increase the path tortuosity of electrical trees, which are favorable for increasing the breakdown strength of the system. Thus, the dielectric constant and breakdown strength increase simultaneously at a low volume fraction (0.35 vol%) of BKFO nanobelts, and an ultrahigh recoverable energy density of 25.4 J/cm3 is achieved. These results provide a strategy to develop high performance flexible high-energy-density devices. Keywords: Dielectric nanocomposite, Energy storage, Nanobelt, Breakdown strength

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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